Proper noun

1. A period in western architecture from ca. 1600 to the middle of the eighteenth century, known for its abundance of decoration.
2. A period in western art from ca. 1600 to the middle of the eighteenth century, characterized by drama, rich color, and dramatic contrast between light and shadow.
3. A period in western music from ca. 1600 to ca. 1760, characterized by extensive use of counterpoint, basso-continuo, and extensive ornamentation.
4. The chess variant invented in 1962 by Mathematician Robert Abbott, or any of its descendants, where pieces move alike, but have differing methods of capture.